Boiler



(No Model.)

' G. D. GILBERT.

BOILER.

No. 364,506. Patented June "7, 1887.,

I WIN 351 Guom /L.

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UNITED STATES PATENT OFFICE.

GEORGE D. GILBERT, OF BOBBY, ASSIGNOB TO RUSH S. BATTLES, OF GIRARD, PENNSYLVANIA.

BOILER.

SPECIFICATION forming part of Letters Patent No. 364,506, dated June '7, 1887.

Application filed February 24, 1887. Serial No. 228,677. (No model.)

To aZZ whom it may concern:

Be it known that I, Gnonen D. GILBERT, a citizen of the United States, residing at Corry, in the county of Erie, State of Pennsylvania, have invented a new and useful Improvement in Upright Boilers, of which the following is so full, clear, and exact a description as will enable others skilled in the art to which my invention appertains to make and use the same, reference being had to the accompanying drawings.

In the drawings, Figure 1 is a vertical section of a'boiler, showing my invention in po-' sition for use. Fig. 2 is a perspective of the dead-plate, shown as corrugated internally and externally. Fig. 3 is abottom plan view of the same.

The same letters of reference designate corresponding parts throughout the specification.

The object of my invention is to construct a boiler which will serve to heat the greatest amount of water and produce the greatest amount of steam in the shortest possible time with the least expense of fuel and apparatus; and to that end the invention consists in the construction and arrangement of parts, as will be hereinafter fully described, and particularly pointed out in the claim at the end of the specification.

In the drawings, A designates the main casing of the boiler, which is provided with an interior lining, A, bolted together at intervals by bolts a a, the interior of the casing A being held in position by the bolts a and the vertical bolts a in the upper portion of the boiler.

A space, B, is left all around the interior lining of the boiler, except at its bottom, be-

' tween the lining and the outer casing, A.

The interior of the inner lining, A, is provided with pendants O 0,-which are closed at the bottom and opened at the top, allowing the water to run down in these pendants or tubes, where it is heated before it ascends. These pendants form a great additional radi ating-surface, and by their use,'toge,ther with the dead-plate D, a large quantity of water can be heated at a very slight expense of fuel and in a short time. The grateE is arranged within the inner lining of the boiler at a line just above the junction of the inner and outer linings, A A. It is fed in the usual manner through the door F.

In the use of boilers of this character it has been found by constant experiment that great difficulty is experienced in retaining the heat and flames within the upper part of the furnace or combustion-chamber sufficient length of time to havethe interior walls of theinner lining and pendants thoroughly heated by the heat before it escapes and wastes up through the due G. To prevent this waste of heat and to secure, if possible, the greatest good from this heat as it passes up through the pendants and upper portion of the combustion-dome, I provide a dead-plate, D, which is suspended Within the boiler-furnace at a point above the fire-bed and between it and the outlet of the flue G, as shown in position in Fig. 1; This dead-plate is held in position by a rod, H, which is secured to the dead-plate at the lower end of the rod, and which is suspended from above, as shown in Fig. 1. To prevent cracking caused by expansion and contraction as the plate is subjected to varying degrees of heat and cold, I construct the dead-plate conical in form", as shown.

In Fig. 2 I show the conical dead -plate, which is corrugated for the purpose also of permitting it to contract and expand, as hereinabove explained, its lower edge and outer periphery being zigzag, as shown 1n Figs. 2 and 3. By making the dead-plate conlcal in shape the heat will be caught within its,

outward-flaring bottom, and a greater portion of the heat will pass 'up'into the interior of the dead-plate, and will be deflected back toward the fire-bed in such a manner that it will be distributed throughout the interior of the combustion-dome and will be absorbed by the pendants O G, as formerly described.

From the foregoing it will be understood that the use of a device of this character will serve to distribute the heat throughout the upper portion of the combustion-dome, and will cause a greater amount of the heat to be absorbed by the pendants as it is thrown off from the coal or fire bed and deflected back by the deadplate.

Having now described the objects, uses, and

advantages of my invention, what I desire to of the combustion-chamber around the pendsecure by Letters Patent, and what I therefore ant-s without liability of injury to the pendclaim, isants, all constructed and combined to operate In a boiler of the character described, the substantially as and for the purposes specified. I5 5 main casing provided with a grate bar, a In testimony that I claim the above as my smoke-flue, and a series of interior pendants, invention I hereunto set my hand in the presin combination with a conical dead-plate corence of two subscribing witnesses.

rugated internally and externally and sus- GEO. 1). GILBERT. pended from its apex within the interior of Witnesses: IO the combustion-chamberbetweenthependants, W. A. NIoHoLs,

to distribute the heat throughout the interior GEO. A. NANTES. 

